Oscillating scraping mechanisms for coke oven jambs

ABSTRACT

IN APPARATUS FOR MECHANICALLY SCRAPING FORMED DEPOSITS FROM THE JAMB OF A COKE OVEN, AN OSCILLATING SCRAPING MECHANISM FOR SCRAPING SAID DEPOSITS FROM SUBSTANTIALLY RIGHT ANGULAR SURFACES EXTENDING ALONG EITHER THE JAMB TOP OR BOTTOM WALLS, AND ARCUATE CORNER PORTIONS CONTIGUOUS THEREWITH. THE MECHANISM FEATURES A SHAFT WHICH IS PROVIDED WITHIN A HOUSING AND HAS ONE END EXTENDING THEREFROM WITH A SCRAPER UNIT THEREON. IN RESPONSE TO THE OSCILLATION OF THE HOUSING, THE SHAFT RECIPROCATES LINEARLY IN FOLLOWING A CAM MEANS THEREBY RESULTING IN A SCRAPING OF SAID DEPOSITS.

Oct. 3, 1972 Filed Julv 15, 1970 c. D M CULLOUGH 3,696,004

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS l0 Sheets-Sheet 15117. I770 C'U LIDLIG'H 1972 Q. 0- MCCULLOUGH OSCILLATING SCRAPINGMECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 1970 10 Sheets-Sheet 2Oct. 3, 1972 c D- M CULLQUGH 3,596,904

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 19701o Sheets-Sheet 5 Oct. 3, 1972 c MOCULLQUGH 7 3,696,004

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS 7 Filed Jul? 15,1970 7 1O Sheets-Sheet 4 v Oct. 3, 1972 c. o. M CULLOUGH 3,

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMES Filed Jun 15, 197010 Sheets-Sheet 5 Oct. 3, 1972 MGCULLOUGH 3,696,004 I OSCILLATINGSCRAPING MECHANISMS FOR COKE OVEN JAMES Fild Julv 15, 1970 10Sheets-Sheet 6 1972 c. D. M CULLOUGH 3,696,904

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filid Julv 15, 197010 Sheets-Sheet '7 Oct. 3, 1972 c. D. M cuLLoucaH 3,

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 1970l0 Sheets-Sheet 8 l/ l l f O h o Oct. 3, 1972 c. D. MCCULLOUGHOSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filid Jul-Y 15, 197010 Sheets-Sheet 9 I /20 W "Mn 'm In,

Oct. 3, 1972 c. D- M CULLOUGH 3,

OSCILLATING SCRA PING MECHANISMS FOR COKE OVEN JAMES Filed Julv 15, 1970l0 Sheets-Sheet 1O United States Patent Office 3,696,004 Patented Oct.3, 1972 US. Cl. 202241 21 Claims ABSTRACT OF THE DISCLOSURE In apparatusfor mechanically scraping formed deposits from the jamb of a coke oven,an oscillating scraping mechanism for scraping said deposits fromsubstantially right angular surfaces extending along either the jamb topof bottom walls, and arcuate corner portions contiguous therewith. Themechanism features a shaft which is provided within a housing and hasone end extending therefrom with a scraper unit thereon. In response tothe oscillation of the housing, the shaft reciprocates linearly infollowing a cam means thereby resulting in a scraping of said deposits.

BACKGROUND OF THE INVENTION Self-sealing doors doors for coke ovens havea sealing strip extending therearound which presents a knife edge to themachined face of the door jamb for sealing therewith. It is well knownthat, in order to be effective, the seal made between a self sealingcoke oven door and its jamb must be gas tight and therefore depends uponthe sealing surface therebetween being initially clean. Thus, due to theformation of deposits of a pitchy, carbonaceous nature along the sealingstrip surface and jamb during the coking operation, it is necessary toperiodically clean these surfaces, preferably after each cokingoperation.

Coke oven jamb cleaning has in the past generally been performedmanually by scraping and chipping the deposits from the sealingsurfaces. The cleaning performed in this manner is tedious and arduouswork which is not efiiciently performed because of the prevailing heatconditions in the vicinity of the coke oven door jambs. Further, suchcleaning results in uneconomically long shut-down of the coke ovensbetween charges and, additionally, the equipment used in scraping andchipping often mars the sealing jamb surfaces.

Various proposals have been made in the past for mechanically effectingthe cleaning of the sealing surfaces of coke oven jambs, such as the useof mechanical scrapers. Such scrapers have not proved satisfactory dueto wear characteristics on the sealing surfaces and their inability tomeet self-cleaning requirements. Further, such scrapers were inefficientfor scraping the top and bottom surfaces of the jamb, and the arcuatecorner portions contiguous therewith.

SUMMARY OF THE INVENTION It is therefore an object of the presentinvention to provide an improved scraper mechanism in a jamb cleaner forscraping the top and bottom surfaces of a coke oven jamb, and thearcuate corner portions contiguous therewith.

Broadly, the invention is concerned with an oscillating scrapermechanism for scraping formed deposits from substantially right angularsurfaces extending along the top or bottom walls of the jamb, and thearcuate corner portions contiguous therewith. The mechanism includes aframe and a first shaft rotatably mounted in the frame having one endconnected to a housing. A second shaft, located within the housing, hasone end extending therefrom which is connected to a scraper cutter unitcapable of scraping right angular surfaces of the jamb wall and thearcuate corner portions. A cam follower connected to the second shafttravels about a cam having a configuration substantially similar to thejamb wall and contiguous corner portions, said cam follower travellingabout the cam, in response to the oscillation of the first shaft, toimpart linear reciprocating movement to the second shaft as the housingoscillates, thereby resulting in the scraper unit on the second shaftscraping the deposits from the jamb wall and contiguous corner portions.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects and a fullerunderstanding of the invention may be had by referring to the drawingsin which:

FIG. 1 is a side view of the top half portion of the jamb cleaner;

FIG. 2 is a side view of the bottom half portion of the jamb cleaner;

FIG. 3 is a front view of the top half portion of the jamb cleaner;

FIG. 4 is a front view of the bottom half of the jamb cleaner;

FIG. 5 is a rear view of the bottom half portion of the jamb cleanerdepicting the latching mechanism and carriage drive means;

FIG. 6 is a plan view of the left-hand side of the jamb cleanerdepicting the carriage, and reciprocating linear scraper means incontact with the jamb;

FIG. 7, is a plan view of the right hand side of the jamb cleanerdepicting the carriage, and reciprocating linear scraper means incontact with the jamb;

FIG. 8 depicts the relationship of FIGS. 6 and 7, respectively;

FIG. 9 is a partial cross-sectional view of the upper oscillatingscraper mechanism;

FIG. 10 is a view taken along the line 10-40 of FIG. 9;

FIG. 11 is a front view of the primary and secondary heat-resistantshield assemblage;

FIG. 12 is a front view of a primary heat-resistant shield;

FIG. 13 is a front view of a secondary heat-resistant shield;

FIG. 14 depicts a portion of the frame for holding the heat-resistantshields;

FIG. 15 schematically illustrates the jamb cleaner in a position whereatthe oscillating and linear scraping mechanisrns are midway between thetop, bottom and side walls of the jamb during their scraping cycle;

FIG. 16 schematically illustrates the jamb cleaner whereat each of theoscillating and linear scraping mechanisms are at one end of theirscraping cycle; and

FIG. 17 schematically illustrates the jamb cleaner whereat each of theoscillating and linear scraping mechanisms are at the other end of theirscraping cycle.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring more particularly toFIGS. 1-5 of the drawings, there is depicted a jamb cleaner of theinstant invention which is capable of cleaning a jamb located at eitherthe coke side or pusher side of the battery. The jamb cleaner may bemounted on a movable control apparatus (not shown) having associatedtherewith a door extracting means, a pusher machine, a door cleaner,etc. or any combination thereof.

The jamb cleaner, includes a vertically extending main frame 10 ofrectangular configuration having a top end 11, bottom end 12 and sides13, 14. Each of the sides 13, 14 are provided with a plurality ofbrackets 15--15 mounted thereon by bolt means 1616, each bracket havingextending portions 1717 (FIG. 6) projecting therefrom. A tube railcarriage 18 (FIGS. 3, 4 and 6) vertically extends along side 13 and,similarly, a tube rail carriage 19 vertically extends along side 14,each of said carriages being of substantially square cross-section andin parallel relationship to each other and main frame 10. The tube railcarriages 18, 19 are similar; thus, for the sake of simplicity, it is tobe understood that a description of tube rail carriage 18 and itsrelated components will suffice for a description of tube rail carriage19 and its related components.

As seen in FIG. 6, the far ends of extending portions 17--17 projectslightly beyond the walls 18a, 18b of tube rail carriage 18, and fixedlypositioned between the rear ends of said extending portions 1717 is aprimary rotating guide roller 20 which is normally in contact with tuberail carriage wall 180, and said roller having flanged ends 2121 whichpartially envelop rail carriage walls 18a, 18b. The roller functions toguide tube rail carriage 18 vertically during its linear reciprocatingmovement, and to exert a pressure on scraper blades 25--25, to bedescribed more in detail hereinafter.

A pair of tracks 26a, 26b extend along the entire length of tube railcarriage walls 18a, 18b, respectively. Secondary rollers 27a, 27b aremounted on respective extensions 17a, 17b, which are connected toextending portions 1717 by conventional securing means 17c17c, saidsecondary roller rotationally traveling over respective tracks 26a, 26bto positively insure that guide rail carriage 18 is normally positionedagainst primary roller 20.

A plurality of supports 30-30 are fixedly connected to tube railcarriage wall 18d at predetermined spaced intervals for supporting aplurality of shafts 3131 (FIGS. 1-4) which extend in axial relationshipto each other and in parallel relationship with tube rail carriage 18. Aplurality of substantially L-shaped blade units, generally referred toat 2525 (FIG. 6), are connected to shafts 3131 at predetermined spacedintervals, each blade unit having a cutting edge 25a and a cutting edge25b for scraping undesired carbon-tar substances formed on outer surface35a and inner surface 35b, respectively, of jamb 35. Torsion springs3737 are coiled about shafts 31-31, each spring being connected at 37ato the shaft and at 37b to guide rail carriage 18 to hold the angle ofthe blade units in a first position such that each blade cutting edge2511 faces jamb surface 35a for initially striking said jamb surfacewhen the jamb cleaner is moved by conventional means (not shown) intoposition with respect to the jamb. Continued forward movement of thejamb cleaner causes each blade cutting edge 25a to exert a force againstouter jamb surface 35a and, in turn, causes shafts 31-31 to rotate,thereby resulting in each blade cutting edge 25b engaging jamb surface35b, thus causing the blade units to assume a second position such thata full contact of each blade cutting edge 25a, 25b is made with itsrespective jamb surface 35a, 35b.

Each of blade cutting edges 25a, 25b, as seen in FIG. 6, is attached toblade holders 40a, 4012, respectively, by securing means 41-41, such asthe bolt-nut type, which are connected through elongated slots 42a-42aand 42b-42b of each cutting edge and holder, respectively. With thisarrangement the blades may be adjustably positioned for contact with thejamb. Further, the cutting edges 25a, 25b may be quickly and easilyreplaced, when worn or damaged, simply by disassembling the securingmeans 41-41 when the cleaner is in the retracted position.

A pair of springs 43a43a and 43b-43b each are positioned within itsrespective holder to normally urge its blade cutting edge outwardlytherefrom and provide sufficient tension through the blades against thejamb. Consequently, during a scraping operation, the cutting edges areenabled to scrape various irregular deposits of coal-tar substancesformed on the jamb.

A pair of fluid operated cylinders 45-45 (FIGS. 2, 4 and are mounted onthe main frame and provided with respective pistons 45a, 45b whose ends46a, 46b are connected by conventional fastening means 47a, 47b to guiderail carriages 18, 19, respectively. A conventional 4-way valve,generally referred to at 48, causes the cylinders to operate in anopposing reciprocating linear relationship when the cylinders areactivated by means (not shown). Thus, when the jamb cleaner is inposition with respect to the jamb for a scraping operation, as piston45a extends it causes guide rail carriage 18 and, in turn, scraper bladeunits 2525 associated therewith to move and scrape its respective jambsurfaces 35a, 35b, in an upwardly direction. Simultaneosuly, piston 45bretracts and causes guide rail carriage 19 and, in turn, scaper bladeunits 25--25 associated therewith to move and scrape its respective jambsurfaces 35a, 35b in a downwardly direction. As a result the top righthalf portion and the bottom left half portion of the jamb is cleaned.After piston 45a is fully extended and piston 45b is fully retracted,valve 48 causes each piston to move in the opposite direction therebyresulting in carriage 18 moving downwardly and carriage 19 movingupwardly causing the blade units thereon to clean the bottom right handportion and top left hand portion of the jamb, respectively. The scraperblade units 2525 are so spaced from each other and the extension oftravel of each piston is such that each blade unit slightly overlaps thearea of travel of a succeeding blade unit by approximately two to threeinches to insure that the total surface area of the jambs side surfacesare totally scraped.

After a scraping operation, further described in detail hereinafter, asthe jamb cleaner retracts from the jamb, torsion springs 37-37 arecaused to unwind to their normal rest position thus permitting shaft31-3 1 to rotate in the opposite direction and, in turn, pivotallyreturn and hold the blade units 2525 in their normally inward firstposition with respect to the jamb.

As seen in FIGS. 1-4, a chain 50 interconnects the top ends of guiderail carriages 18, 19 by conventional attaching means 51-51 and,similarly, a chain 52 interconnects the bottom ends of said guide railcarriages by conventional attaching means 5353, said chains respectivelydriving upper and lower oscillating head mechanisms 55, 56 (now to bedescribed) for scraping the carbon-tar deposits located on the arcuatecorners and top and bottom surfaces of the jamb.

As more particularly depicted in FIGS. 1, 3 and 9, oscillating headmechanisms 55 and 56 are substantially similar in structure andfunction; accordingly, the description of one will suflice for theother. The oscillating head mechanism (FIG. 9) includes a shaft 60 whichis rotationally mounted at one end in main frame 10 by mounting means,generally referred to at 61, the other end of said shaft being welded at62 to a housing '63. A sprocket 64, for driving chain 50, is connectedabout shaft 60 on one side by a fastener plate 65 and screws 66-66, andon the other side by a back-up ring 67 which is welded to the sprocketat 68.

Located within a housing 63a (FIG. 9), which is threadedly connected tohousing 63 by coupling 69, is a rectangularly shaped shaft 70 having athreaded end 71 with a spring 72 coiled thereabout. One end of thespring is in contact with an internally disposed blocking surface 73 ofthe housing and the other end of the spring is in contact with a plate74 associated with nut means 75 which are threadedly connected to end 71for adjusting the desired tension on the shaft. Shaft 70 is providedwith a pair of an arm 81 connected to shaft 70 and having a blade holder83 for holding blade 84 which is removably connected thereto byfastening means 85-85. A spring 86 is coiled about arm 81 to insure andmaintain the application of sufiicient tension through blade 84 againstouter jamb surface 86a for scraping various irregular deposits from thejamb surface.

Also loctaed at the far end of shaft 70 is a blade cutting unit,generally referred to at 90, which includes a connecting member 91attached to shaft 70 at 92-92 and having an arm 93 connected to bladeholder 94 for holding blade 95 which is removably connected thereto byfastening means 96-96. A spring 97 is coiled about arm 93 to insure andmaintain the application of sufficient tension through blade 95 againstinner jamb surface 86b to permit the blade to scrape the variousirregular deposits from the jamb surface.

Also located near the far end of shaft 70 is a cam roller 100 forfollowing an inverted U-shaped cam track 101 (FIGS. 3 and 9) affixed tothe top end of main frame and having a configuration similar to butpreferably smaller than the top and corner portions of the jamb. It isto be noted that while the U-shaped cam track 101 (FIG. 3) at the top ofthe frame is inverted, a similar U-shaped cam 102 (FIG. 4) located atthe bottom end of the frame and cooperatively associated withoscillating head mechanism 56 is not inverted and has a configurationsimilar to but preferably smaller than the bottom and corner portions ofthe jamb.

As chain 50 is driven in response to the movement of carriages 18 and19, roller 100 follows cam track 101 causing blades 84 and 95 to scrapethe carbon-tar substances located in their paths as they travel from onetop corner portion of the jamb and along its top surface to the othertop corner portion thereof. As roller 100 travels towards and over thearcuate corner portions 101a (FIG. 3) of track 101, shaft 70 is movedlinearly under spring tension within housing 63a to permit blade cuttingunits 80 and 90 to advance to the corresponding surface areas of thejam-b and effectively scrape the carbon-tar substances therefrom. Asroller 100 travels towards and over the mid-section 101b of the camtrack, shaft 70 reciprocates linearly in the opposite direction topermit the blade cutting units to scrape the corresponding surface areaof the jamb. During the linear reciprocating movement of shaft 70,lateral movement of the shaft is substantially prevented by cam rollers77-77, previously described.

The aforesaid vital components of the jamb cleaner are protected againstthe intense heat emanating from the oven, when the jamb cleaner is inposition for scraping the jamb, by a plurality of primary heat-resistantshields 110-110 (FIGS. 1, 2, 11, 12 and 13) which are successivelyvertically aligned and extend substantially the length of the cleaner.The primary shields 110-110 are constructed of a heat-resistantmaterial, such as stainless steel or Iconel, and are connected to avertically extending frame 111 by bolts 1112-112 passing throughsupporting member 113, said vertically extending frame being connectedto main frame .10 by brackets 114-114. The shields may be any desiredconfiguration, preferably square or rectangular, and are of a widthapproximately equal to the width of the oven opening.

A gap or space 115-115, of about 1 inch or more, is provided betweeneach successive shield 110 to provide a free area of movement for theshields as they expand due to their exposure to the intense heat of theoven, thereby preventing a warping or buckling of said shields.Secondary heat shields 1'16-116 (FIGS. 1 and 13), constructed of amaterial similar to the primary shields and preferably of rectangularconfiguration, are located in an area slightly behind the gaps 115-115of the primary shields and are connected to frame 111 by bolts 117-117passing through supporting members 118-118.

As seen in FIGS. 12 and 13, each of the primary and secondary heatshields are respectively provided with at least one elongated slot 120,121 through which the bolts respectively pass for connecting the shieldsto frame 111. The bolts are not tightly fastened against the elongatedslots in order to permit freedom of movement of the shields, via theelongated slots, during heat expansion thereof. In this manner bucklingor warping of the shields are prevented. Each of the shields 110, 4116also are respectively provided with at least one relatively smallerdiameter opening 122, 123 for receiving the bolts for securing theshields more tightly to frame 111. Finally, as seen in FIG. 14,supporting brackets 114 also are provided with elongated slots 125-125for receiving bolts for securing the heat shield frame thereto, saidslots providing the necessary area for movement of the frame in responseto any heat expansion thereof.

In operation, the jamb cleaner is moved towards the oven opening byconventional moving means (not shown). As the jamb cleaner approachesthe jamb, guide rollers -130 (FIG. 4) located near the mid-portion ofthe cleaner and projecting from sides 13 and 14 respectively, engagefixed guides (not shown) extending from the external surface of the ovenwall. As rollers 130-130 ride over the guides, the jamb cleaner becomesvertically aligned with the jamb. A tapered alignment arm 131 (FIG. 1)located at the top of the cleaner engages a complementary V-shapedslotted member (not shown) located at the top external surface of theoven and, simultaneously, a V-shaped slotted member 132 (FIG. 2) locatedat the bottom of the cleaner engages a nib (not shown) projecting fromthe bottom external surface of the oven, thereby permitting the cleanerto be not only more positively aligned with the jamb but also to secureit from lateral movement during operation of the cleaner. Forwardmovement of the jamb cleaner is finally stopped when a pair of upperstops 133-133 (FIG. 3) and a pair of lower stops 134-134 (FIG. 4), eachof the pairs being located on the front of the cleaner, make fullcontact with the external surface of the oven thereby indicating thatthe cleaner is oriented with respect to the jamb.

A latching mechanism (FIG. 5), generally referred to at 135, includes afluid operated cylinder 136 and piston 137 which is pivotally connectedat 138 to a lever 139 pivotally mounted at 140. When the jamb cleaner isin ready position with respect to the jamb, it is positively secured tothe oven front by actuating cylinder 136 which causes lever 139 topartially rotate clockwise until lever ends 139a-139a engage and becomelocked in opposing looped lugs (not shown) extending from the externalsurface of the oven, thereby not only finally orienting the cleaner withthe jamb but also securely locking the cleaner to prevent movement ofthe cleaner frame during the scraping operation.

As schematically illustrated in FIGS. 15, 16 and 17, the jamb cleaner isshown in varying positions during a scraping cycle. In FIG. 15, it canbe assumed that the jamb cleaner is in a start position whereat tuberail carriages 18 and I19 are located approximately along themid-sections of the jamb side walls, and upper and lower oscillatinghead mechanisms 55 and 56 are located approximately along themid-sections of the top and bottom walls, respectively, of the jamb.

As seen in FIG. 16, upon actuation of cylinders 45-45, piston 45aextends to move carriage 18 upwardly which, in turn, drives chain 50 torotate upper oscillating head mechanism 55 clockwise, thereby permittingthe scraper blades associated therewith to scrape the carbon-tarsubstances from the adjacently disposed top surface of the jamb and thearcuate corner portion contiguous therewith, whereat the scraper unitsstop when said piston is fully extended. Simultaneously with andsimilarly to the aforesaid movement, piston 45b retracts and movescarriage 19 downwardly and, in turn, drives chain 52 to rotate loweroscillating head mechanism 56 clockwise, thereby permitting the scrapingblades associated therewith to scrape the carbon-tar substances from theadjacently disposed bot- 7 tom surface of the jamb and the arcuatecorner portions contiguous therewith.

As seen in FIG. 17, piston 45a has retracted and piston 45b has extendedwhich, in turn, caused carriages 18, 19 and oscillating head mechanisms55, 56 to move in the opposite directions to the other ends of theirrespective jamb surfaces, the scraping units thereon scraping thecarbon-tar deposits in their paths. When carriages 18, 19 andoscillating head mechanisms 55, 56 have reached the other ends of theirrespective paths, the cycle may be repeated to insure removal of all thecarbon-tar deposits from the surfaces of the j amb.

I claim:

1. In apparatus for mechanically scraping formed deposits from the jambof a coke oven, an oscillating scraping mechanism for scraping saiddeposits from substantially right angular surfaces extending alongeither the jamb top or bottom walls and arcuate corner portionscontiguous therewith, which comprises:

a frame,

a first shaft rotatably mounted in the frame and having one endextending therefrom,

a housing connected to said one end of the first shaft,

a second shaft located within said housing and having one end extendingtherefrom,

a scraper cutting unit connected to said one end of the second shaft andcapable of scraping right angular surfaces of the jamb wall and arcuatecorner portions contiguous therewith,

a cam having a configuration substantially similar to the jamb wall andarcuate corner portions contiguous therewith,

a cam follower connected to the second shaft for travel about the cam,and

means for rotationally oscillating said first shaft within predetermineduniform limits of travel, thereby causing the cam follower to travelabout the cam and correspondingly impart linear reciprocating movementto the second shaft as the housing oscillates rotationally with saidfirst shaft, thereby resulting in the scraper unit on said second shaftscraping the deposits formed on the jamb wall and the arcuate cornerportions contiguous therewith.

2. In apparatus according to claim 1, wherein the cam is a substantiallyU-shaped member having a configuration substantially similar to thebottom wall of the jamb and arcuate corner portions contiguoustherewith, and the cam follower is a roller in communication with saidcam.

3. In apparatus according to claim 1, wherein the cam is a substantiallyinverted :U-shaped member having a configuration substantially similarto the top wall of the jamb and arcuate corner portions contiguoustherewith, and the cam follower is a roller in communication with saidcam.

4. In apparatus, according to claim 1, wherein the other end of thesecond shaft is located within the housing and is provided withresilient means cooperatively associated with the inner surface of saidhousing for applying sufiicient tension on said second shaft during itslinear reciprocating movement.

5. In apparatus, according to claim 4, wherein:

adjustable means are provided on said other end of the second shaft forregulating the tension exerted by the resilient means.

6. In apparatus, according to claim 4, wherein:

cam means are provided in the housing for contact with the second shaftto prevent lateral movement of said second shaft during its linearreciprocating movement.

7. In apparatus, according to claim 6, wherein the cam means includes:

a pair of longitudinal recessed ways located on opposing surfaces ofsaid second shaft, and

at least one pair of cam rollers fixedly located within 8 the housingand rotatable upon its own axis in contact with said recessed ways.

8. In apparatus, according to claim 4, wherein said scraping cuttingunit includes:

a holder connected to said second shaft,

a pair of blades in substantially right angular relationship to eachother extending from said holder for communication with the jamb surfaceto be scraped, and

resilient means located within the holder for imparting sutficienttension upon the blades against the jamb surface, thereby enabling theblades to scrape irregularly formed deposits thereon.

9. In apparatus, according to claim 8, wherein the blades are providedwith removable, adjustable means for adjusting the blades with respectto the blade holder.

10. In apparatus, according to claim 9, wherein the blade holder iscomprised of individual housings for each blade.

11. In apparatus for mechanically scraping formed deposits from the jambof a coke oven, a scraping unit including an upper oscillating scrapingmechanism for scraping deposits from substantially right angularsurfaces of the top wall and arcuate corner portions contiguoustherewith, and a lower oscillating scraping mechanism for scrapingdeposits from substantially right angular surfaces of the bottom walland arcuate corner portions contiguous therewith, which comprises:

a frame,

each of said upper and lower oscillating mechanisms including a firstshaft rotatably mounted in the frame and having one end extendingtherefrom, a housing connected to said one end of the first shaft, asecond shaft located within said housing and having one end extendingtherefrom, a scraper cutting unit connected to said one end of thesecond shaft and capable of scraping right angular surfaces of the jambwall and arcuate corner portions contiguous therewith, a camcooperatively associated with the frame and having a configurationsubstantially similar to the jamb wall and arcuate corner portionscontiguous therewith, and a cam follower connected to the second shaftfor travel about the cam,

means for simultaneously rotating said first shafts alternately inopposite directions within predetermined uniform limits of travel,thereby causing the cam followers of each mechanism to travel about itsrespective cam and correspondingly impart linear reciprocating movementto the respective second shafts as the housings oscillate rotarily withsaid first shafts, thereby resulting in the respective scraper units ofthe upper and lower oscillating mechanisms scraping the formed depositsfrom the top and bottom wall surfacgs, and arcuate corner portionscontiguous therewit 12 In apparatus according to claim 11 wherein therotating means includes:

a sprocket connected to each of the first shafts,

a chain cooperatively associated with the teeth of each sprocket, and

means for driving said chain a predetermined distance alternately inopposite directions to cause the upper and lower oscillating mechanismsto oscillate in opposing reciprocating relationship with each other,said predetermined distance being that distance necessary to move themechanisms a distance equal to the length of said wall and contiguousarcuate corner portions desired to be scraped.

13. In apparatus, according to claim 11, wherein the cam for the lowermechanism is of U-shaped configuration and the cam for the uppermechanism is of an inverted U-shaped con-figuration, and

said cam, followers are rollers for each respective cam.

14. In apparatus, according to claim 11, wherein the other end of eachsecond shaft is located within the hous- 9 ing and provided withresilient means cooperatively associated with its respective housinginner surface for applying tension on said second shafts during theirlinear reciprocating movements.

15. In apparatus, according to claim 14, wherein adjustable means areprovided on each of the other ends of the second shafts for regulatingthe tension exerted by the resilient means.

16. In apparatus, according to claim 14, wherein cam means are providedin each housing for contact with each of the second shafts to preventlateral movement of said second shafts during their linear reciprocatingmovement.

17. In apparatus, according to claim 16, wherein the cam means includes:

a pair of longitudinal recessed Ways located on opposing surfaces ofeach of said first shafts, and

at least one pair of cam rollers fixedly located within each housing androtatable upon its own axis in contact with said recessed Ways.

18. In apparatus, according to claim 14, wherein each of said scrapingcutting units includes:

a holder connected to said second shaft,

a pair of blades in substantially right angular relationship to eachother extending from said holder for communication with the jamb surfaceto be scraped, and

resilient means located within the holder for imparting sufficienttension upon the blades against the jamb surface, thereby enabling theblades to scrape irregularly formed deposits thereon.

19. In apparatus, according to claim 18, wherein the blades are providedwith removable, adjustable means for adjusting the blades with respectto the blade holder.

20. In apparatus, according to claim 19, wherein the blade holder iscomprised of individual housing for each blade.

21. In apparatus for mechanically scraping formed de' posits from thejamb of a coke oven, a scraping unit including an upper oscillatingscraping mechanism for scraping deposits from substantially rightangular surfaces of the top wall and arcuate corner portions contiguoustherewith, and a lower oscillating scraping mechanism for scrapingdeposits from substantially right angular surfaces of the bottom walland arcuate corner portions contiguous therewith, which comprises:

a frame;

each of said upper and lower oscillating mechanisms including a firstshaft rotatably mounted in the frame and having one end extendingtherefrom; a housing connected to said one end of the first shaft; asecond shaft located within said housing and having one end extendingtherefrom; resilient means cooperatively associated with the other endof said second shaft; adjustable means for adjusting the resilientmeans; a scraper cutting unit connected to said one end of the secondshaft, said scraper cutting unit including a holder having cuttingblades removably mounted in said holder and located in substantiallyright angular relationship to each other, and resilient means urgingsaid blades outwardly from the holder, said cutting blades of eachmechanism being capable of scraping right angular surfaces of therespective top and bottom surfaces of the jamb and arcuate cornerportions contiguous therewith;

an inverted U-shaped cam connected to the upper part of the frame;

a =U-shaped cam connected to the lower part of the frame;

a cam roller connected to each of said second shafts for travel aboutits respective cam;

a sprocket connected to each of the first shafts,

a chain cooperatively associated with the teeth of each sprocket, and

means for driving said chain reciprocatively a predetermined distance tocause each of the first shafts to rotate in opposite directions and, inturn, cause the cam rollers of each mechanism to travel about itsrespective cam and impart linear reciprocating movement to itsrespective second shafts as the housings oscillate with said firstshafts, thereby causing the respective scraper units of the upper andlower mechanisms to scrape the deposits formed on the respective top andbottom Wall surfaces and arcuate corner portions contiguous therewith,said predetermined distance being that distance necessary to move themechanisms a distance equal to the length of each said wall andcontiguous arcuate portions desired to be scraped.

References Cited UNITED STATES PATENTS 3,526,013 9/1970 Kato 15-93 AFOREIGN PATENTS 867,761 5/1961 Great Britain 202-241 NORMAN YUDKOFF,Primary Examiner D. EDWARDS, Assistant Examiner US. Cl. X.R. 15-93 A

